Propylene polymer
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United States of America Patent
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Jun 29, 2004
Grant Date -
Nov 20, 2003
app pub date -
May 16, 2002
filing date -
May 16, 2002
priority date (Note) -
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Abstract
A propylene polymer is characterized by satisfying the following (1) to (5): (1) a melt flow rate (MFR) measured at 230.degree. C. under a 2.16 kg load of from 0.1 to 1000 g/10 min; (2) an isotactic triad traction (mm) measured by .sup.13 C-NMR of 99.0 % or above; (3) a Q value measured by gel permeation chromatography (GPC) of from 2.0 to 6.0; (4) a relation between melt flow rate (MFR: g/10 min) measured at 230.degree. C. under a 2.16 kg load and a memory effect (ME) measured at 190.degree. C. at an orifice diameter of 1.0 mm satisfying the following formula (I): 1.75.gtoreq.(ME)+0.26.times.log(MFR).gtoreq.1.40 (I); and (5) a relation of the cold xylene solubles at 23.degree. C. (CXS) satisfying the following formula (II) CXS.ltoreq.0.5.times.[C2]+0.2.times.log(MFR)+0.5 (II) wherein [C2] represents the ethylene unit content (% by weight) in the polymer.
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